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Configuring a NET

Configuring a NET

Context

NET is the special form of the network service access
point (NSAP). After the IS-IS view is displayed, IS-IS can start only
when a NET is configured for an IS-IS process.

Generally, you
only need to configure one NET for an IS-IS process. When an area
needs to be redefined, for example, the area needs to be merged with
other areas or divided into sub-areas, configure multiple NETs to
ensure route correctness. A maximum of three area addresses can be
configured for an IS-IS process. Therefore, a maximum of three NETs
can be configured for an IS-IS process. When configuring multiple
NETs, ensure that their system IDs are the same.

Procedure

Run system-view

The system view is displayed.

Run isis [ process-id ]

The IS-IS process view is displayed.

Run network-entitynet

A NET is configured.

NOTE:

Configuring loopback interface addresses
based on NETs is recommended to ensure that a NET is
unique on the network. If NETs are not unique, route flapping will
easily occur.

An area ID uniquely identifies an area in the
same IS-IS domain. All routers in the same Level-1 area must share
the same area ID, while routers in the same Level-2 area can have
different area IDs.